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Making Salts using Titration

Formula

  • V1 x C1 = V2 x C2
    • V1 - volume of acid
    • C1 - concentration of acid
    • V2 - volume of base
    • C2 - concentration of base

Method

  • Place a conical flask
  • Measure out 25cm3 of sulphuric acid using a glass pipette
    • Transfer to the conical flask
  • Add 3 drops of phenolphthalein to the conical flask
  • Place a clamp and position a burette above the conical flask
    • Ensure the valve is closed before adding the sodium hydroxide solution
  • When the valve is closed, fill the burette to 0cm3 with sodium hydroxide solution
  • Add 0.5cm3 of sodium hydroxide
  • After the sodium hydroxide is added, swirl the beaker around to mix the contents
    • Measure amount of sodium hydroxide used and record observations in colour change
      • If there is no colour change then repeat the steps
      • If there is a colour change then note down the volume of sodium hydroxide used
        • Repeat the experiment but with smaller increments to get an accurate result
          • Repeat until the data is concordant (within 0.13 each other)
  • With completed the experiment and the data is concordant, calculate the mean titre (start - end volume)